DoLP observed with VLT/SPHERE-ZIMPOL for the ATOMIUM sources. For each star the image taken with the filter at the shortest available wavelength is shown. The white contours correspond to the 5σ (and 30σ for W Aql) level, the red cross indicates the star position, the dashed cyan circles correspond to distances of 10 and 20 R_⋆ from the star center. The field of view is 1 arcsec × 1 arcsec for each source. The white ruler at the bottom of the image defines the size scale. North is up, and east is to the left. We note that the color scale has been adapted to each source to highlight the polarization signal.